| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 3536 | 2 |
| 2015 | 3358 | 2 |
| 2014 | 3384 | 2 |
| 2013 | 3184 | 2 |
| 2012 | 3079 | 2 |
| 2011 | 3134 | 2 |
| 2010 | 2902 | 2 |
| 2009 | 2288 | 2 |
| 2008 | 2055 | 2 |
| 2007 | 2082 | 2 |
| 2006 | 1601 | 2 |
| 2005 | 1443 | 3 |
| 2004 | 1261 | 3 |
| 2003 | 1188 | 3 |
| 2002 | 1004 | 3 |
| 2001 | 1047 | 3 |
| 2000 | 1010 | 3 |
| 1999 | 1053 | 3 |
| 1998 | 1025 | 3 |
| 1997 | 1010 | 3 |
| 1996 | 997 | 2 |
| 1995 | 879 | 3 |
| 1994 | 862 | 3 |
| 1993 | 749 | 3 |
| 1992 | 767 | 2 |
| 1991 | 737 | 2 |
| 1990 | 862 | 2 |
| 1989 | 795 | 2 |
| 1988 | 828 | 1 |
| 1987 | 749 | 1 |
| 1986 | 683 | 2 |